EP1861906B1 - Voie de decharge remplie de gaz - Google Patents

Voie de decharge remplie de gaz Download PDF

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Publication number
EP1861906B1
EP1861906B1 EP06706016A EP06706016A EP1861906B1 EP 1861906 B1 EP1861906 B1 EP 1861906B1 EP 06706016 A EP06706016 A EP 06706016A EP 06706016 A EP06706016 A EP 06706016A EP 1861906 B1 EP1861906 B1 EP 1861906B1
Authority
EP
European Patent Office
Prior art keywords
discharge path
electrode
gas
electrodes
activation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP06706016A
Other languages
German (de)
English (en)
Other versions
EP1861906A1 (fr
Inventor
Wolfgang DÄUMER
Frank Werner
Jürgen Boy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Electronics AG
Original Assignee
Epcos AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Epcos AG filed Critical Epcos AG
Publication of EP1861906A1 publication Critical patent/EP1861906A1/fr
Application granted granted Critical
Publication of EP1861906B1 publication Critical patent/EP1861906B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/24—Selection of materials for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed

Definitions

  • the invention relates to a gas-filled discharge path such as spark gap or surge arrester.
  • a gas-filled discharge section is from the document DE 19814631 A1 known.
  • a glassy electrode activating composition is used which contains several components, inter alia as a basic component cesium tungstate (Cs 2 WO 4 ).
  • Cs 2 WO 4 cesium tungstate
  • a discharge gap is shown with an electrode activation mass which contains, inter alia, a small proportion of K 2 WO 4 .
  • the invention has for its object to provide a gas-filled discharge gap with good extinguishing properties.
  • a gas-filled discharge gap with at least two electrodes is specified, in which an electrode activation mass containing K 2 WO 4 is applied to ensure at least one of the ignition properties, wherein K 2 WO 4 as a base component of the electrode activation mass in an amount of 20 to 90 weight percent is provided.
  • Potassium tungstate has the properties of a getter. This material is chemically very stable and can exert a getter effect even after a surge current load. As an additional property, free potassium and / or potassium oxide is formed by reduction of K 2 WO 4 in the gas-filled cavity, resulting in a low work function of the activating composition.
  • Potassium tungstate melts at a brazing temperature of about 820 °, in particular loose activation particles are bound, so that the escape of loose activation particles can be prevented from the activation mass.
  • the envisaged in the invention use of a potassium tungstate or one of the other potassium compounds containing activation mass ensures very good quenching properties of the discharge path after electrical load.
  • An arrester with a K 2 WO 4 containing activation mass extinguished automatically and reliably after a discharge despite the applied DC voltage.
  • a discharge path designed as a spark gap, with a, for example, ceramic, preferably cylindrical, hollow body with a jacket surface is specified. Open end faces of the hollow body are closed by end electrodes. Thus, a closed cavity is formed, which is filled with a noble gas.
  • the activation mass is arranged on the mutually facing active surfaces of the electrodes.
  • the active surfaces may have at least one or more indentations in the form of a waffle for receiving the activating mass. Waffling is understood to mean intersecting depressions.
  • a plurality of recesses may be provided, which do not intersect.
  • a discharge path designed as a two-way arrester is provided with two end electrodes, preferably arranged on the end side, and a hollow-cylindrical center electrode. Between the center electrode and one of the end electrodes, a hollow-cylindrical ceramic insulator is preferably arranged in each case.
  • the activation mass is for application to both the center electrode and the end electrodes of the arrester suitable.
  • the center electrode may be provided with a circumferential groove for receiving the activation mass.
  • the activation mass can be incorporated in end electrodes in both embodiments on the mutually facing active electrode surfaces in the recesses provided for this purpose.
  • the activation mass may consist of a basic component, K 2 WO 4 .
  • the activation mass may contain a plurality of components, in particular base components.
  • K 2 WO 4 is provided as a base component of the activating composition in an amount of 20 to 90% by weight, preferably in an amount of 30 to 60% by weight.
  • the activation composition may in one variant have at least one base component and, in addition, additives.
  • One of the basic components is K 2 WO 4 .
  • the electrode material may also contain a proportion of glass or silicates, for.
  • Further suitable are BaTiO 3 , TiO 2 , LiNbO 3 , Na 2 B 4 O 7 , MgO. Na 2 B 4 O 7 , MgO are particularly suitable as additives.
  • the base components may be contained in an amount of about 20 to 90% by weight, respectively, and the additives may be contained in an amount of about less than 10% by weight, respectively.

Landscapes

  • Compositions Of Oxide Ceramics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Spark Plugs (AREA)
  • Catalysts (AREA)
  • Glass Compositions (AREA)

Abstract

L'invention concerne une voie de décharge remplie de gaz, comprenant au moins deux électrodes et une masse d'activation d'électrodes, qui est disposée sur au moins une des électrodes. La masse d'activation d'électrodes contient du K2WO4.

Claims (4)

  1. Parcours de décharge rempli de gaz et présentant au moins deux électrodes et une masse d'activation d'électrode disposée sur au moins l'une des électrodes, la masse d'activation d'électrodes contenant du K2WO4, caractérisé en ce que
    le K2WO4 est prévu comme composant de base de la pâte d'activation d'électrodes à raison de 20 à 90 % en poids.
  2. Parcours de décharge selon la revendication 1, configuré comme parcours d'étincelles doté de deux électrodes terminales disposées frontalement.
  3. Parcours de décharge selon la revendication 1, configuré comme évacuateur de surtension doté de deux électrodes terminales disposées frontalement.
  4. Parcours de décharge selon l'une des revendications 1 à 3, dans lequel la pâte d'activation d'électrodes est disposée dans un creux de chaque électrode.
EP06706016A 2005-03-23 2006-02-24 Voie de decharge remplie de gaz Active EP1861906B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005013499A DE102005013499A1 (de) 2005-03-23 2005-03-23 Gasgefüllte Entladungsstrecke
PCT/DE2006/000347 WO2006099833A1 (fr) 2005-03-23 2006-02-24 Voie de decharge remplie de gaz

Publications (2)

Publication Number Publication Date
EP1861906A1 EP1861906A1 (fr) 2007-12-05
EP1861906B1 true EP1861906B1 (fr) 2011-07-13

Family

ID=36219680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06706016A Active EP1861906B1 (fr) 2005-03-23 2006-02-24 Voie de decharge remplie de gaz

Country Status (6)

Country Link
US (1) US7795810B2 (fr)
EP (1) EP1861906B1 (fr)
JP (1) JP4801139B2 (fr)
CN (1) CN101147304B (fr)
DE (1) DE102005013499A1 (fr)
WO (1) WO2006099833A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005016848A1 (de) * 2005-04-12 2006-10-19 Epcos Ag Überspannungsableiter
JP5167967B2 (ja) * 2008-06-12 2013-03-21 パナソニック株式会社 静電気対策部品の製造方法
SI23691A (sl) 2011-03-21 2012-09-28 ISKRA ZAŠČITE d.o.o. Plinski odvodnik s kovinskim ohišjem za visokotokovne udare

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430485A1 (de) 1984-08-18 1986-02-27 Basf Ag, 6700 Ludwigshafen Brennstoffzelle
DE4318994C2 (de) * 1993-05-26 1995-04-20 Siemens Ag Gasgefüllter Überspannungsableiter
CH691245A5 (de) 1996-01-12 2001-05-31 Epcos Ag Gasgefüllte Entladungsstrecke.
DE19632417C1 (de) 1996-08-05 1998-05-07 Siemens Ag Gasgefüllter Überspannungsableiter mit Elektroden-Aktivierungsmasse
DE19741658A1 (de) 1997-09-16 1999-03-18 Siemens Ag Gasgefüllte Entladungsstrecke
DE19814631A1 (de) 1998-03-26 1999-09-30 Siemens Ag Gasgefüllte Entladungsstrecke
JP3718142B2 (ja) * 2001-06-22 2005-11-16 岡谷電機産業株式会社 放電管
WO2004091060A1 (fr) 2003-04-10 2004-10-21 Okaya Electric Industries Co., Ltd. Tube a decharge et dispositif absorbant les surtensions
JP4247556B2 (ja) * 2003-08-08 2009-04-02 岡谷電機産業株式会社 放電型サージ吸収素子

Also Published As

Publication number Publication date
DE102005013499A1 (de) 2006-10-05
US7795810B2 (en) 2010-09-14
CN101147304B (zh) 2011-12-21
US20080048545A1 (en) 2008-02-28
CN101147304A (zh) 2008-03-19
JP4801139B2 (ja) 2011-10-26
WO2006099833A1 (fr) 2006-09-28
EP1861906A1 (fr) 2007-12-05
JP2008535150A (ja) 2008-08-28

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